package/depot-tools: new package

Chromium and Chromium OS use a package of scripts called
depot_tools to manage checkouts and code reviews. This package
also includes the gclient utility.

gclient is a Python script to manage a workspace of modular dependencies that
are each checked out independently from different subversion or git
repositories. Features include:

  - Dependencies can be specified on a per-OS basis.
  - Dependencies can be specified relative to their parent dependency.
  - Variables can be used to abstract concepts.
  - Hooks can be specified to be run after a checkout.
  - .gclient and DEPS are Python scripts. You can hack in easily or add
     additional configuration data.

.gclient file: It's the primary file. It is, in fact, a Python script. It
specifies the following variables:

  - solutions: an array of dictionaries specifying the projects that will be
               fetched.
  - hooks: additional hooks to be run when this meta checkout is synced.
  - target_os: an optional array of (target) operating systems to fetch
               OS-specific dependencies for.
  - cache_dir: Primarily for bots, multiple working sets use a single git
               cache.

gclient is necessary for checking out the flutter-engine source code, as the
release tarballs provided on the flutter-engine github are in no state to
compile. Google expects the use of gclient to download a source directory
structure suitable to build the Flutter engine.

Signed-off-by: Adam Duskett <adam.duskett@amarulasolutions.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

DEVELOPERS

@@ -31,6 +31,9 @@ F:	package/firewalld/
 F:	package/vulkan-loader/
 F:	package/vulkan-tools/
 
+N:	Adam Duskett <adam.duskett@amarulasolutions.com>
+F:	package/depot-tools/
+
 N:	Adam Heinrich <adam@adamh.cz>
 F:	package/jack1/
 

package/Config.in.host

@@ -19,6 +19,7 @@ menu "Host utilities"
 	source "package/cryptsetup/Config.in.host"
 	source "package/dbus-python/Config.in.host"
 	source "package/delve/Config.in.host"
+	source "package/depot-tools/Config.in.host"
 	source "package/dfu-util/Config.in.host"
 	source "package/dos2unix/Config.in.host"
 	source "package/dosfstools/Config.in.host"

package/depot-tools/Config.in.host

@@ -0,0 +1,10 @@
+config BR2_PACKAGE_HOST_DEPOT_TOOLS
+	bool "host depot-tools"
+	select BR2_PACKAGE_HOST_PYTHON3
+	select BR2_PACKAGE_HOST_PYTHON3_SSL
+	select BR2_PACKAGE_HOST_PYTHON_SIX
+	help
+	  Chromium and Chromium OS use a package of scripts called
+	  depot_tools to manage checkouts and code reviews.
+
+	  https://www.chromium.org/developers/how-tos/install-depot-tools/

package/depot-tools/depot-tools.hash

@@ -0,0 +1,3 @@
+# Locally calculated
+sha256  8e0bccdd6b1231f58d5453dc14a5e1d195295ac8d466dec34961e951e946b50b  depot-tools-4e87f5bfe244e903f712408ea68dc3c3a6fe2d00-br1.tar.gz
+sha256  984523ee987f4e8b72d61df37d8f1189a7077cd4b77e41a397e35593b297a29d  LICENSE

package/depot-tools/depot-tools.mk

@@ -0,0 +1,25 @@
+################################################################################
+#
+# depot-tools
+#
+################################################################################
+
+DEPOT_TOOLS_VERSION = 4e87f5bfe244e903f712408ea68dc3c3a6fe2d00
+DEPOT_TOOLS_SITE = https://chromium.googlesource.com/chromium/tools/depot_tools
+DEPOT_TOOLS_SITE_METHOD = git
+DEPOT_TOOLS_LICENSE = BSD-3-Clause
+DEPOT_TOOLS_LICENSE_FILES = LICENSE
+DEPOT_TOOLS_CPE_ID_VENDOR = google
+
+HOST_DEPOT_TOOLS_DEPENDENCIES = \
+	host-python3 \
+	host-python-httplib2 \
+	host-python-pyparsing \
+	host-python-six
+
+define HOST_DEPOT_TOOLS_INSTALL_CMDS
+	mkdir -p $(HOST_DIR)/share/depot_tools
+	cp -dprf $(@D)/* $(HOST_DIR)/share/depot_tools/
+endef
+
+$(eval $(host-generic-package))